Dash Core Source Documentation (0.16.0.1)

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lockedpool.cpp
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1 // Copyright (c) 2016 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #include <bench/bench.h>
6 
7 #include <support/lockedpool.h>
8 
9 #include <iostream>
10 #include <vector>
11 
12 #define ASIZE 2048
13 #define BITER 5000
14 #define MSIZE 2048
15 
16 static void BenchLockedPool(benchmark::State& state)
17 {
18  void *synth_base = reinterpret_cast<void*>(0x08000000);
19  const size_t synth_size = 1024*1024;
20  Arena b(synth_base, synth_size, 16);
21 
22  std::vector<void*> addr;
23  for (int x=0; x<ASIZE; ++x)
24  addr.push_back(nullptr);
25  uint32_t s = 0x12345678;
26  while (state.KeepRunning()) {
27  for (int x=0; x<BITER; ++x) {
28  int idx = s & (addr.size()-1);
29  if (s & 0x80000000) {
30  b.free(addr[idx]);
31  addr[idx] = nullptr;
32  } else if(!addr[idx]) {
33  addr[idx] = b.alloc((s >> 16) & (MSIZE-1));
34  }
35  bool lsb = s & 1;
36  s >>= 1;
37  if (lsb)
38  s ^= 0xf00f00f0; // LFSR period 0xf7ffffe0
39  }
40  }
41  for (void *ptr: addr)
42  b.free(ptr);
43  addr.clear();
44 }
45 
47 
bool KeepRunning()
Definition: bench.cpp:39
#define ASIZE
Definition: lockedpool.cpp:12
#define BITER
Definition: lockedpool.cpp:13
void * alloc(size_t size)
Allocate size bytes from this arena.
Definition: lockedpool.cpp:58
static void BenchLockedPool(benchmark::State &state)
Definition: lockedpool.cpp:16
#define MSIZE
Definition: lockedpool.cpp:14
void free(void *ptr)
Free a previously allocated chunk of memory.
Definition: lockedpool.cpp:89
BENCHMARK(BenchLockedPool)
Released under the MIT license